JEE Main 2025 (Online) 29th January Morning Shift

0.1 mole of compound ‘S’ will weigh ___________ g.(Given molar mass in g mol−1 C : 12, H : 1, O : 16)

The product (P) formed in the following reaction is :

Match List - I with List - II.

List - I (Structure)
List - II (IUPAC Name)


(A)
(I) 4-Methylpent-1-ene


(B) (CH3)2C(C3H7)2
(II) 3-Ethyl-5-methylheptane


(C)
(III) 4,4-Dimethylheptane

...

Total number of nucleophiles from the following is :

Match List - I with List - II.



List - I (Carbohydrate)
List - II (Linkage Source)




(A) Amylose
(I) $\beta$ - $C_1 - C_4$, plant


(B) Cellulose
(II) $\alpha$ - $C_1 - C_4$, animal


(C) Glycogen
(III) $\alpha$ - $C_1 - C_4$, $\alpha$ ...

At temperature T, compound $AB_{2(g)}$ dissociates as $AB_{2(g)} \rightleftharpoons AB_{(g)} + \frac{1}{2} B_{2(g)}$ having degree of dissociation $ x $ (small compared to unity). The correct expression for $ x $ in terms of $ K_p $ and $ p...

The reaction $A_2 + B_2 \rightarrow 2AB$ follows the mechanism:$A_2 \overset{k_1}{\underset{k_{-1}}{\rightleftharpoons}} A + A$ (fast)$A + B_2 \xrightarrow{k_2} AB + B$ (slow)$A + B \rightarrow AB$ (fast)The overall order of the reaction is...

In the following substitution reaction :

Product 'P' formed is :

The steam volatile compounds among the following are :

$\text { Choose the correct answer from the options given below : }$

Given below are some nitrogen containing compounds :Each of them is treated with HCl separately. 1.0 g of the most basic compound will consume _______ mg of HCl.(Given molar mass in g mol−1 C : 12, H : 1, O : 16, Cl : 35.5)

The correct increasing order of stability of the complexes based on $\Delta_0$ value is :

I. $[\text{Mn}(\text{CN})_6]^{3-}$
II. $[\text{Co}(\text{CN})_6]^{4-}$
III. $[\text{Fe}(\text{CN})_6]^{4-}$
IV. $[\text{Fe}(\text{CN})_6]^{3-}$

Match List - I with List - II.


List - I (Complex)
List - II (Hybridisation & Magnetic characters)


(A) [MnBr4]2-
(I) d2sp3 & diamagnetic


(B) [FeF6]3-
(II) sp3d2 & paramagnetic


(C) [Co(C2O4)3]...

The correct option with order of melting points of the pairs (Mn, Fe), (Tc, Ru) and (Re, Os) is :

The molar mass of the water insoluble product formed from the fusion of chromite ore (FeCr₂O₄) with Na₂CO₃ in presence of O₂ is ___________ g mol⁻¹.

For a Mg | Mg2+ (aq) || Ag+ (aq) | Ag the correct Nernst Equation is :

The molar conductivity of a weak electrolyte when plotted against the square root of its concentration, which of the following is expected to be observed?

The standard reduction potential values of some of the p-block ions are given below. Predict the one with the strongest oxidising capacity.

The sum of sigma (σ) and pi (π) bonds in Hex-1,3-dien-5-yne is ________.

An element ‘E’ has the ionisation enthalpy value of 374 kJ mol⁻¹. ‘E’ reacts with elements A, B, C and D with electron gain enthalpy values of −328, −349, −325 and −295 kJ mol⁻¹, respectively. The correct order of the products EA, EB, EC an...

Given below are two statements :Statement (I) : The radii of isoelectronic species increases in the order.
Mg2+ < Na+ < F$-$ < O2-Statement (II) : The magnitude of electron gain enthalpy of halogen decreases in the order.
Cl > F > Br > IIn ...

1.24 g of AX2 (molar mass 124 g mol−1) is dissolved in 1 kg of water to form a solution with boiling point of 100.015°C, while 25.4 g of AY2 (molar mass 250 g mol−1) in 2 kg of water constitutes a solution with a boiling point of 100.0260°C...

If A2B is 30% ionised in an aqueous solution, then the value of van't Hoff factor (i) is _______ × 10−1.

Choose the correct statements.(A) Weight of a substance is the amount of matter present in it.(B) Mass is the force exerted by gravity on an object.(C) Volume is the amount of space occupied by a substance.(D) Temperatures below 0°C are pos...

If $a$0 is denoted as the Bohr radius of hydrogen atom, then what is the de-Broglie wavelength (λ) of the electron present in the second orbit of hydrogen atom? [n : any integer]

500 J of energy is transferred as heat to 0.5 mol of Argon gas at 298 K and 1.00 atm. The final temperature and the change in internal energy respectively are: Given: R = 8.3 J K-1 mol-1